DataVXAdvanced MaterialsPaper
journal article·2023-01Open access

Boosting Perovskite Solar Cells Efficiency and Stability: Interfacial Passivation of Crosslinked Fullerene Eliminates the “Burn‐in” Decay

Changzeng Ding, Li Yin, Jinlong Wang, Valentina Larini, Lianping Zhang, Rong Huang, Mathias Nyman, Liyi Zhao, Chun Zhao, Weishi Li, Qun Luo, Yanbin Shen, Ronald Österbacka, Giulia Grancini, Chang‐Qi Ma

Advanced Materials· Volume 35· Issue 2
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Source abstract

Abstract

Abstract Perovskite solar cells (PSCs) longevity is nowadays the bottleneck for their full commercial exploitation. Although lot of research is ongoing, the initial decay of the output power – an effect known as “burn‐in” degradation happening in the first 100 h – is still unavoidable, significantly reducing the overall performance (typically of >20%). In this paper, the origin of the “burn‐in” degradation in n‐i‐p type PSCs is demonstrated that is directly related to Li+ ions migration coming from the SnO2 electron transporting layer visualized by time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS) measurements. To block the ion movement, a thin cross‐linked [6,6]‐phenyl‐C61‐butyric acid methyl ester layer on top of the SnO2 layer is introduced, resulting in Li+ immobilization. This results in the elimination of the “burn‐in” degradation, showing for the first time a zero “burn‐in” loss in the performances while boosting device power conversion efficiency to >22% for triple‐cation‐based PSCs and >24% for formamidinium‐based (FAPbI3) PSCs, proving the general validity of this approach and creating a new framework for the realization of stable PSCs devices.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Nano‐Tech and Nano‐Bionics University of Science and Technology of China 398 Jinzhai Road Hefei 230026 P. R. China

i‐Lab & Printable Electronics Research Center Suzhou Institute of Nano‐Tec and Nano‐Bionics Chinese Academy of Sciences (CAS) 398 Ruoshui Road, SEID, SIP Suzhou 215123 P. R. China

School of Science School of Advanced Technology Xi'an Jiaotong‐Liverpool University 111 Renai Road, SEID, SIP Suzhou 215123 P. R. China

Shanghai Institute of Organic Chemistry Chinese Academy of Science 345 Lingling Road Shanghai 200032 P. R. China

Department of Chemistry & INSTM University of Pavia Via T. Taramelli 14 Pavia 27100 Italy

Vacuum Interconnected Nanotech Workstation Suzhou Institute of Nano‐Tec and Nano‐Bionics Chinese Academy of Sciences (CAS) 398 Ruoshui Road, SEID, SIP Suzhou 215123 P. R. China

Physics and Center for Functional Materials Faculty of Science and Technology Åbo Akademi University Porthaninkatu 3 Turku 20500 Finland

i‐Lab Suzhou Institute of Nano‐Tec and Nano‐Bionics Chinese Academy of Sciences (CAS) 398 Ruoshui Road, SEID, SIP Suzhou 215123 P. R. China

Funding

Chinese Academy of Sciences · European Research Council

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